She offered to take a polygraph but the BPD wasn't interested. Ralph, when she did the 2 interviews with Mame, she specified that she was using the name "Bridget" in order to remain anonymous. Surely you don't think that giving an anonymous interview make someone a public figure?
A quick definition of a public figure from the 'Lectric Law Library Lexicon site:
"To begin with, a fairly high threshold of public activity is necessary to elevate a person to public figure status, Brown v. Kelly Broadcasting Co. (1989) 48 Cal.3d 711, 745, and, as to those who are not pervasively involved in public affairs, they must have "thrust themselves to the forefront of particular public controversies in order to influence the resolution of the issues involved" to be considered a "limited purpose" public figure. Gertz v. Robert Welch, Inc. (1974) 418 U.S. 323, 345."
Nancy entered the Ramsey case as a witness. She never gave out her real name. The BPD should have, but did not, redact her name from the interview transcripts Fleet White sued to obtain. By the way, why would he refer to her as "Nancy Jo" unless he knew her?
His first statement to Det. Spragg contradicted his courtroom testimony, if I remember correctly, regarding the length of time he knew her.